ngx-custom-validators
Version:
Angular custom directives for validation
41 lines • 4.84 kB
JavaScript
import { Validators } from '@angular/forms';
import { isPresent } from '../util/lang';
export const creditCard = (control) => {
if (isPresent(Validators.required(control))) {
return null;
}
const v = control.value;
const sanitized = v.replace(/[^0-9]+/g, '');
// problem with chrome
/* tslint:disable */
if (!(/^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\d{3})\d{11}|(?:9792)\d{12})$/.test(sanitized))) {
return { creditCard: true };
}
/* tslint:enable */
let sum = 0;
let digit;
let tmpNum;
let shouldDouble;
for (let i = sanitized.length - 1; i >= 0; i--) {
digit = sanitized.substring(i, (i + 1));
tmpNum = parseInt(digit, 10);
if (shouldDouble) {
tmpNum *= 2;
if (tmpNum >= 10) {
sum += ((tmpNum % 10) + 1);
}
else {
sum += tmpNum;
}
}
else {
sum += tmpNum;
}
shouldDouble = !shouldDouble;
}
if (Boolean((sum % 10) === 0 ? sanitized : false)) {
return null;
}
return { creditCard: true };
};
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